/*
 *	Copyright (C) 2011-2013 Gregory hainaut
 *	Copyright (C) 2007-2009 Gabest
 *
 *  This Program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *
 *  This Program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA USA.
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */

#pragma once

#ifdef _WINDOWS
#define GL_LOADFN(name) { \
		if( (*(void**)&name = (void*)wglGetProcAddress(#name)) == NULL ) { \
			fprintf(stderr,"Failed to find %s\n", #name); \
		} \
}
#else
#define GL_LOADFN(name) { \
		if( (*(void**)&name = (void*)glXGetProcAddress((const GLubyte*)#name)) == NULL ) { \
			fprintf(stderr,"Failed to find %s\n", #name); \
		} \
}
// Use glew
//#define GL_LOADFN(name)
#endif

extern PFNGLACTIVETEXTUREPROC glActiveTexture;
extern PFNGLATTACHSHADERPROC glAttachShader;
extern PFNGLBINDBUFFERPROC glBindBuffer;
extern PFNGLBINDBUFFERBASEPROC glBindBufferBase;
extern PFNGLBINDFRAGDATALOCATIONINDEXEDPROC glBindFragDataLocationIndexed;
extern PFNGLBINDFRAMEBUFFERPROC glBindFramebuffer;
extern PFNGLBINDPROGRAMPIPELINEPROC glBindProgramPipeline;
extern PFNGLBINDSAMPLERPROC glBindSampler;
extern PFNGLBINDVERTEXARRAYPROC glBindVertexArray;
extern PFNGLBLENDCOLORPROC glBlendColor;
extern PFNGLBLENDEQUATIONSEPARATEPROC glBlendEquationSeparate;
extern PFNGLBLENDFUNCSEPARATEPROC glBlendFuncSeparate;
extern PFNGLBLITFRAMEBUFFERPROC glBlitFramebuffer;
extern PFNGLBUFFERDATAPROC glBufferData;
extern PFNGLCHECKFRAMEBUFFERSTATUSPROC glCheckFramebufferStatus;
extern PFNGLCLEARBUFFERFVPROC glClearBufferfv;
extern PFNGLCLEARBUFFERIVPROC glClearBufferiv;
extern PFNGLCOMPILESHADERPROC glCompileShader;
extern PFNGLCOPYIMAGESUBDATANVPROC glCopyImageSubDataNV;
extern PFNGLCREATEPROGRAMPROC glCreateProgram;
extern PFNGLCREATESHADERPROC glCreateShader;
extern PFNGLCREATESHADERPROGRAMVPROC glCreateShaderProgramv;
extern PFNGLDELETEBUFFERSPROC glDeleteBuffers;
extern PFNGLDELETEFRAMEBUFFERSPROC glDeleteFramebuffers;
extern PFNGLDELETEPROGRAMPROC glDeleteProgram;
extern PFNGLDELETEPROGRAMPIPELINESPROC glDeleteProgramPipelines;
extern PFNGLDELETESAMPLERSPROC glDeleteSamplers;
extern PFNGLDELETESHADERPROC glDeleteShader;
extern PFNGLDELETEVERTEXARRAYSPROC glDeleteVertexArrays;
extern PFNGLDETACHSHADERPROC glDetachShader;
extern PFNGLDRAWBUFFERSPROC glDrawBuffers;
extern PFNGLDRAWELEMENTSBASEVERTEXPROC glDrawElementsBaseVertex;
extern PFNGLENABLEVERTEXATTRIBARRAYPROC glEnableVertexAttribArray;
extern PFNGLFRAMEBUFFERRENDERBUFFERPROC glFramebufferRenderbuffer;
extern PFNGLFRAMEBUFFERTEXTURE2DPROC glFramebufferTexture2D;
extern PFNGLGENBUFFERSPROC glGenBuffers;
extern PFNGLGENFRAMEBUFFERSPROC glGenFramebuffers;
extern PFNGLGENPROGRAMPIPELINESPROC glGenProgramPipelines;
extern PFNGLGENSAMPLERSPROC glGenSamplers;
extern PFNGLGENVERTEXARRAYSPROC glGenVertexArrays;
extern PFNGLGETBUFFERPARAMETERIVPROC glGetBufferParameteriv;
extern PFNGLGETDEBUGMESSAGELOGARBPROC glGetDebugMessageLogARB;
extern PFNGLGETFRAGDATAINDEXPROC glGetFragDataIndex;
extern PFNGLGETFRAGDATALOCATIONPROC glGetFragDataLocation;
extern PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog;
extern PFNGLGETPROGRAMIVPROC glGetProgramiv;
extern PFNGLGETSHADERIVPROC glGetShaderiv;
extern PFNGLGETSTRINGIPROC glGetStringi;
extern PFNGLISFRAMEBUFFERPROC glIsFramebuffer;
extern PFNGLLINKPROGRAMPROC glLinkProgram;
extern PFNGLMAPBUFFERPROC glMapBuffer;
extern PFNGLMAPBUFFERRANGEPROC glMapBufferRange;
extern PFNGLPROGRAMPARAMETERIPROC glProgramParameteri;
extern PFNGLSAMPLERPARAMETERFPROC glSamplerParameterf;
extern PFNGLSAMPLERPARAMETERIPROC glSamplerParameteri;
extern PFNGLSHADERSOURCEPROC glShaderSource;
extern PFNGLUNIFORM1IPROC glUniform1i;
extern PFNGLUNMAPBUFFERPROC glUnmapBuffer;
extern PFNGLUSEPROGRAMSTAGESPROC glUseProgramStages;
extern PFNGLVERTEXATTRIBIPOINTERPROC glVertexAttribIPointer;
extern PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer;

namespace GLLoader {
	bool check_gl_version(uint32 major, uint32 minor);
	void init_gl_function();
	bool check_gl_supported_extension();
}